feat(lambdas): add batch SSM parameter fetching to reduce API calls (… #6579

Job	Run time
Verify module (latest)	24s
Verify examples (1.5.6, termination-watcher)	38s
Verify examples (1.5.6, ephemeral)	40s
Verify examples (1.5.6, default)	38s
Verify examples (latest, prebuilt)	26s
Verify examples (1.5.6, prebuilt)	38s
Verify examples (latest, ephemeral)	27s
Verify examples (latest, termination-watcher)	20s
Verify examples (1.5.6, multi-runner)	34s
Verify examples (latest, external-managed-ssm-secrets)	28s
Verify examples (latest, default)	26s
Verify modules (1.5.6, download-lambda)	24s
Verify modules (latest, multi-runner)	21s
Verify modules (1.5.6, runners)	21s
Verify modules (1.5.6, setup-iam-permissions)	21s
Verify examples (1.5.6, external-managed-ssm-secrets)	43s
Verify modules (latest, lambda)	20s
Verify modules (1.5.6, ami-housekeeper)	25s
Verify modules (1.5.6, multi-runner)	24s
Verify modules (latest, runner-binaries-syncer)	21s
Verify modules (1.5.6, ssm)	19s
Verify modules (1.5.6, runner-binaries-syncer)	24s
Verify modules (1.5.6, termination-watcher)	23s
Verify modules (latest, termination-watcher)	21s
Verify modules (1.5.6, lambda)	24s
Verify modules (latest, ssm)	20s
Verify modules (latest, setup-iam-permissions)	19s
Verify modules (latest, webhook)	23s
Verify modules (latest, runners)	17s
Verify modules (latest, download-lambda)	21s
Verify modules (1.5.6, webhook)	25s
Verify modules (latest, ami-housekeeper)	17s
Verify module (1.5.6)	29s
Verify examples (latest, multi-runner)	24s
	14m 25s

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